webinar-python-exam-review-2023-08-26

# Exam Review 2023 Aug 26

# Do those LABS
# Ch 2-14... all Labs!
# Ch 21-32 just ADDITIONAL LABS, but important practice!
# Prac Tests, Ch 33 and 34
# Use Submit Mode and get them to 100%!!! And PAY ATTENTION to the unit tests!

# Comp 1: Basic syntax and knowledge: operators, data types, etc
# Comp 2: Control Flow
# Comp 3: Modules and Files


# Comp 1: Basic syntax and knowledge: operators, data types, etc

# Operators
# = # assigns
# == # asking if they're equal... a conditional expression
# +
# -
# *
# /
# % # modulo (remainder... whole number)... how many whole things didn't fit since that last even division?
# // # floor division... the last even division
# <
# >
# <=
# >=
# += # x += 1 --> x = x+1
# -= # x -= 1
# ** # raise to a power... math.pow()... or built-in pow()
# !=
# # keywords
# in # if x in myList
# not # if not x in myList
# and
# or # any one True makes the combo True... limit OR to 2-3 conditions

# Common Data Types/Classes
# int
# float
# bool # True, False... x < 5... evaluates to True or False... x = 2 print(x > 10) False
# str # "" most important type?
# list # [ ]
# dict # {key: value}
# tuple # ( ) immutable, Python sees x,y,z as (x,y,z) --> return x,y --> return (x,y)
# set # { } all unique/no duplicates, unordered --> no indices, no slicing, no sorting
# range # range()... range(0, 4) --> [0, 1, 2, 3]

# Comp 2
# Control Flow! The HOW stuff
# IF statements... if, if/else, if/elif/else, etc
# LOOPS
# WHILE - an IF that repeats
# FOR -  looping over a container, or a known number of times... hence range()
# Check out my For Loops webinar in The Gotchas
# for ___ in _someContainer_:
# for item in myList:
# for char in myStr:
# for key in myDict: # getting the key's value... myDict[key]
# for num in range(0, 8):
# for i in range(len(myList)): # myList[i]
# for i, item in enumerate(myList):

# FUNCTIONS
# defining/writing vs calling
# a function has ONE particular job

# def someFunction(x, y):
#     return x ** y
#
# if __name__ == "__main__": # is this the script that was run?
#     # here we're solving this particular question (the whole question)
#     myInput = int(input())
#     myOther = int(input())
#     # myNum = someFunction(myInput, myOther)
#     # print(myNum)
#     print(someFunction(myInput, myOther))

# See "tasks" in the last section of Ch 10, 11, 13, 14 for function writing practice
# # CodingBat also has good function-based Python questions:
# https://codingbat.com/python

# BUILT-IN FUNCTIONS
# input()
# print()
# len()
# min()
# max()
# sum()
# list()
# int()
# str()
# dict()
# tuple()
# set()
# float()
# range()
# type() # type("hello").__name__ # str
# enumerate()
# open()
# round()
# help()
# dir()

# help(str) # help(str.isspace)
# print(dir(str))

# STRINGS
# be able to refer to indices, and slice
# myStr = "abc"
# revStr = myStr[::-1] # mySlice[start:stop:step]
# print(revStr)

# KNOW YOUR WHITESPACE
# " " # space from spacebar
# # a lot of Unicode spaces
# "\n" # new line return... print()
# "\t"
# "\r"

# STRING METHODS
# myStr.format() # "stuff I want to put together {}".format(var)
# myStr.strip() # input().strip()
# myStr.split() # returns a list of smaller strings
# " ".join(listOfString)
# myStr.replace(subStr, newSubStr) # "remove" myStr = myStr.replace(subStr, "")
# myStr.find(subStr) # return index where found... int
# myStr.count(subStr) # return int count of occurrences
# case: myStr.lower(), myStr.upper(), myStr.title(), myStr.capitalize)()
# is/Boolean: myStr.islower(), .isupper(), .isspace(), .isalpha(), .isalum(), .isnumeric(), .isdigit()
# myStr.startswith(subStr), myStr.endswith(subStr)

# LISTS
# be able to ref by index, slice

# LIST METHODS
# +
# myList.append(item)
# myList.insert(i, item)
# myList.extend(anotherList)
# # -
# myList.pop(i) # pop by index
# myList.remove(item) # remove by value
# myList.clear()
# # other
# myList.count(item)
# myList.sort() # does not return a value!
# myList.reverse() # does not return a value!
# myList.copy()
# myList.index(item)
#
# # DICT
# # use the key like an index []... then you don't need DICT methods
# myDict[key] # retrieve the value for that key
# myDict[key] = value # assign a new value to that key

# # DICT METHODS
# myDict.keys()
# myDict.values()
# myDict.items() # for key, value in myDict.items()
#
# if var in myDict: # looks at keys
#
#

# MODULES
# math and csv

# MATH MODULE
# import math # FULL IMPORT
# math.factorial(x)
# math.ceil(x.yz)
# math.floor(x.yz)
# math.pow(x, y)
# math.sqrt(x)
# math.fabs(x) # built-in abs()
# math.pi
# math.e

# PARTIAL IMPORT
from math import ceil # ceil(x.yz)
from math import factorial, sqrt # factorial(x), sqrt(y)
from math import * # ceil(x.yz)

# ALIAS IMPORT
import math as m # m.floor(y.z)


# FILES

# READ MODE
# with open("test.txt", "r") as f:
#     # f.read() # returns whole file as one string
#     # f.readlines() # return a list of strings, line by line
#     contents = f.readlines()
# print(contents)
# for line in contents:
#     line = line.strip()
#     print(line)

# CSV Module
import csv
with open("mock_data.csv", "r") as f1: # mockaroo.com
    contents = list(csv.reader(f1)) # contents = csv.reader(f1, delimiter="\t")
# print(contents)

# WRITE MODE
with open("output_data24.csv", "w") as f2:
    for row in contents :
        # only write a line to file if email is at .ru address
        # email is at position 3
        if row[3].endswith(".ru"):
            # I'll write with file write()
            f2.write(",".join(row) + "\n")

# APPEND MODE
# with open("append_to_this.txt", "r") as f3:
#     print(f3.readlines()) # ['Frodo\n', 'Sam\n', 'Merry']... no line return on last line this time
with open("append_to_this.txt", "a") as f3:
    f3.write("\nPippin") # since there wasn't a line return after Merry I won't add one after Pippin